Spark Plugs

Individual Plugs & Plug Sets

Do you know what's the most common reason for the catalytic converter to fail? It may sound strange but quite often it's all because of the worn-out spark plugs. This small yet vital component helps your vehicle run properly, while the damaged unit can cause a lot of troubles, including excessive fuel consumption and sluggish performance. Unfortunately, the only way to check whether a spark plug needs replacement is by visual examination. Well, as soon as you notice any visual damage, don't hold up and get a new plug.

We aim to provide our customers with the finest Spark Plugs the industry can offer, which is why we accept no compromise when it comes to the quality. Created by the most reputable names in the industry, such as Champion, Autolite, Bosch, NGK, Motorcraft, Denso the Spark Plugs we've gathered for you feature precise design and everlasting durability.

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As always, CARiD stores any and all replacement spark plugs available on the market - copper, platinum, iridium plugs and much more! Full throttle response, better fuel efficiency, and reduced emission levels are only couple of benefits you'll get with a new part. By getting new plugs with us, you can also enjoy our affordable prices, fast shipping and excellent follow-up service.

Before making a replacement, let's first learn how a spark plug functions. The part consists of several elements: the terminal, insulator, body, and two electrodes (center electrode and ground). Screwed into the cylinder head, the plug provides a spark which is required to ignite the air-fuel mixture. The plug also operates like a heat exchanger as it removes any excessive heat from the combustion chamber. Day after day, the plugs must cope with high pressures, extreme temperatures and constant vibration. And even though they are designed to withstand that, wear and tear is inevitable.

The spark plugs never fail all of a sudden, instead they gradually wear out. And that is why it's a good idea to know why and how fast spark plugs get damaged. It happens that the engine stumbles and then it doesn't start at all. Sometimes the engine might run and then misfire. The damaged spark plug is likely the culprit. There are various reasons for the failure. The engine condition, the purity of the fuel you usually use, and even the way you drive affect the useful life of the items. Oil buildup, carbon and combustion deposits, lean air/fuel mixtures can all lead to the plug damage. When it happens, let CARiD set your mind at ease and offer the first-class replacements.

Let's find out how often your spark plugs need inspection and replacement. Well, every 30,000 miles is a normal baseline. But remember that vehicles have different requirements, and the spark plugs may stay healthy for 100,000 miles or even more. Yet when the time comes, just remove the plug and visually examine it. Should you notice glazing, white deposits or excessive electrode wear, the time has come for replacement. It is an easy job to do if you can remove the plugs. But if you are not mechanically inclined or feel like it's a bit complicated task, then visit the nearest auto repair center.

Here they are - the reasons why you need to change your old plugs. The number one reason is that the new parts maintain high engine performance and efficiency. New plugs also improve cold starting, which allows the engine to effortlessly start in the coldest weather. The third 'why' is that the new spark plugs minimize the risk of the catalytic converter failure. Well, now you see that spark plugs should be replaced when damaged or worn-out. Fix the problem as soon an possible with the repair parts that we've gathered for you at CARiD.

This article will guide you through a generic tune up on most any car or light duty gasoline-powered vehicle built within the last 20 years or so. We will presume that you are tuning up your engine because it has reached the mileage or time point to do so, and that you are NOT performing a tune up to cure an engine performance defect. We make this distinction...

Since the dawn of the automobile, spark plugs have been an integral part of gasoline engines because they conduct the electrical energy from a vehicle’s ignition system needed to finalize the combustion process. After the gas/air mixture has been fully compressed inside the cylinder head, spark plugs serve a miniature bolt of lightning to create an explosion...

This is the second time I ordered parts from CARiD. I ordered spark plugs for my Lincoln LS. The order was delivered on time and in perfect condition. My technician had no difficulty installing the part. And what's more, they are performing excellently well. In terms of quality and efficient service, you can trust CARiD! Dr. Ben

I bought these to replace the defective two piece OEM plugs that break off on my 2005 F150 V8. These are specifically designed to prevent breakage upon removal and can handle a lot of torque because they are a one piece design. The dealer wanted to install so called improved Motorcraft plugs and I said no way. Once the old plugs were out and these were in, the engine seemed to run a little better. Buy the way, the longer you wait to change the plugs, the more likely you will end up with serious engine damage.

I used these to replace the OEM plugs on 2005 and 2007 Ford F-150's. If you've been paying attention, you know most of them need to be replaced, BEFORE they get too old (IE: "carboned" up). These are a much improved design over the OEM version. Seem to work great, so far, after about a year and 30,000+/- miles. Maybe slightly better gas mileage... A little expensive, but we think it was worth it to eliminate a VERY expensive and difficult future problem of broken off plugs.

If you buy this plug to replace the originals on your Ford/Mercury/Lincoln product, this is one you need. The reason is that the originals are prone to break INSIDE the head. When the original Motorcraft plugs were manufactured, the nut and electrode sheath are machined separately, then pressed together. The electrode sheath on this and the original plug are long. About 3 inches long. As you can see from the photo, the electrode sheath is 2/3 length of the plug. On the top of that, the plugs are recessed into the head to reach the upper cylinder wall. What happens over time is that the sheath rusts to the head and when you attempt to replace the plug, sheath, and nut.

I previously had copper NGK plugs for 2 years and switching to these made a difference my car now runs smoothly. The price for 4 of these were crazy exceptional plus they're platinum!! This was my first time buying a product from this site and I got what I needed all hastle free they got right back to me in within the same evning when all phones lines were busy. The shipping was fast, I'm definitely looking forward to making another purchase with CARiD.com!

I replaced the original equipment NGK iridium plugs in my 2002 Acura RSX with Autolite iridium ones and noticed no drop off in performance. After 46,000 miles with these plugs, the car runs great and my gas mileage is as good as ever. The Autolite plugs cost less than the NGK plugs.

These spark plugs are 3 years old with over 30K and my vehicle starts as fast as the day I put them in. It takes more then 2 hours to replace the plugs on my Mercury Cougar, so I want to do it only when necessary.

All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only.It is neither inferred nor implied that any item sold by CARiD.com, is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.